For specific answers to you questions, it would be helpful for us to know what you have in mind as far as the antenna such as the band of operation, power, antenna system characteristics, etc. May be this is for a wire antenna hung between supports as you'd like light weight.

Perhaps 1.5mm winding wire isn't the best approach; coil factor typology, wire spacing, # of turns are important and should be optimized based on the above.

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